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International Journal of Morphology

versión On-line ISSN 0717-9502

Resumen

PRABHAKAR, J; PRIYA, M. S; DOSS, L. Jones Tarcius  y  SUKUMARAN, V. G. Piecewise Straight Line Approximation of Curve Existing in Slightly Curved Mesiobuccal Root Canal of Mandibular First Molar: A Radiographic Investigation. Int. J. Morphol. [online]. 2013, vol.31, n.1, pp.131-135. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022013000100021.

The aim of this study was to radiographically investigate the curve existing in slightly curved mesiobuccal canal of mandibular first molar by applying Piecewise straight line approximation. Extracted human mandibular molars were radiographed and one hundred radiographs were selected whose mesiobuccal canal showed slight curvature (10-20°) according to Schneider's method. The curves were traced and analyzed using Piecewise straight line method. Each curve was considered as a unit consisting of six different pieces of straight lines joining at seven specific points and the angle of curvature at these points was determined using the slope formula. All curves analyzed in this study had varying degrees of curvatures at different points on the curve. Maximum curvature (0.40°) was recorded at the middle third of the root canal. Within the limitation of the study, significant curvature occurs through out the curve existing in the mesiobuccal canal of mandibular first molar and the middle third of the curve showing greater degree of curvature. There is a possibility of greater curvature occurring in the coronal third of the curve. Though three dimensional studies would be more appropriate, Piecewise straight line approximation may be a better method than existing methods to simulate canal geometry.

Palabras clave : Piecewise straight lines; Canal curvature; Mesiobuccal canal; Schneider method; Curvature radius; Canal simulation; Angle of curvature.

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